My Bad
Going forward, what would be my strategy, to enable delta sync repl with
one master is already running with 200G mdb db.
What i understand is
Â1.enable accesslog overlay on master server configure accesslogÂ start
the master
Â 2. Take backup with mdb_copyand restore it on other master servers.
Â 3. Enable accesslog configure to new consumers(work as providers as
well)

That sounds about right. I assume you are using current RE24 OpenLDAP, and
not 2.4.33.